One of the unusual black corals documented making circles in the sediment during Dive 14 at Explorer Ridge Deep.
Making Circles
Image courtesy of the NOAA Office of Ocean Exploration and Research, 2016 Deepwater Exploration of the Marianas. Download larger version (jpg, 1.1 MB).

One of the unusual black corals documented making circles in the sediment during Dive 14 at Explorer Ridge Deep.

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